Bushing remover and replacer



Feb. 14, 1950 B. c. HAMILTON BUSHING REMOVER AND REPLACER Filed April22, 1948 IN VEN TOR.

BERT c. HAMILTON ATTOR N EY Patented Feb. 14, 1950 UNITED STATES PATENT:

OFFICE.

, 2,497,498. BUSHING-REMOVE AND REPLACER' Bert-C; Hamilton, La Grande,Oreg. Application April 22,1948, Serial No. 22,667

2 -GIalms; (01. 29-283) This: applicationis: a: continuation in" part ofmy co-pending application: filed underdate of April 12, 1948, Serial"No. 205,438, and entitled- Meansfor removing and replacing tubularbushings 'a-nd relates in general to the same'subject" matter.

The invention described in my above mentioned;- co-pending applicationis concerned with the replacement o'f a single tubular or-splitbushingin: a bearing; Insomes-bearings, more particularly: in bearings found incertain makes fof automotive' vehicles; a. pair-of-bushings-is placed ina bear-- ing in' place of a single bushingand anannular; space is' leftinside the bearing; between'the' ad-- jacnt' edges of the two bushingsto serve as an oil channel inside the bearing;

Thus; in placing a pair of"newbushing's in=suchabearing, care mustber.taken no-tto push thebushings axially so far" into the" bearingthattheirinner edges will touch each other-and thus obliterate the oilchannel;v Heretofore ithas been customary topress' one bushing in' fromone side of the bearing and'then to .pressthe sece- 0nd bushing" in fromtheother'si'de; taking care notto' press'either bushing in too-far.

While the 1 means described in my above memtionedco-pending applicationwill serve for removing a pair of bushingsxof this: type Home bearing,an attempt torusethesame' means for setting the pair of'new bushings in"the bearing would result inthe two bushings being placed witirtheirinner edgestoucl'iing each-other. and

thus withoutrleavingthe desired spacing to serve a as the'centralannular -oil channel;

The objectr of this present invention isrto pro:-

vide..a means 'somewhatsimil'ar to: that described in my: abovementioned cmpending, application; but"? which can be-usedl for replacinga pair of old bushings with a' pair OfTIlGW bushings: :insubstan tiallyonewmain operation;.:and.which will enableeio.

thexreplacing to bes done quickly-and easi1y*.

A further objectrof the present:invention.isa to provider a .modifiedbut" simple and inexpensive. device which can be employed eitherwithabearingrcontaining a pair of bushings-as above mentioned, or" witha bearing. in:wl'iiclr-abutia single.

bushing isi'nrounted.

Themanneriin which these objectsareattained:

will.-;be:apparent fromthe following-brief descrip? tion with reference:towthe: accompanying drawingsvin which? Fiig. I. is avertical section:oi;fmy.:modifiedbush--- removenand. repiac.er,.,illustrating1 the em!ployment. on theysames forr therareplacementlot 3E pain-oi bushingsin-abearina; the'zparts beineaae ill-ustrated'=' as:arranged' inpreparation for the operation of" thedevice" but the top ring; and: capbeing: shown separated and raised above the starting. position for."the' sake of clarity;

Fig. 2 is a vertical section corresponding toliig:

1 butill'ustratingithecposition.of the membersFandJ par'tswhenthexreplacement of the --two oldbush ings' by thetwo new: bushings has:been nearly completed;

Fig. 3' is: a; fragmentary vertical: section: ofthe lower portion of 1my device illustrating there-- moval. of the device fromthebearing afterthe new' bushingsrhave beemset implace; in theebear ing and thus-"-after? the completion of the 01571- eratiom;

Fig, 41s a fragmentaryplanisectionionithe line. 44 of Fig. 3, but drawnto a larger scale;

Fig; 5' is an: elevation. showing: my device em,-

ployed' in: conjunction with a simple-viseby means; of. whichtherrequired. pressure" isobtained for:

pushing: out: the old bushings and pressing irr: theinew: bushings;thisfigure correspondingt'o- Fig"; 2 but drawn: to' a: slightly smaller:scale;:

and:

Fig. 6:"is;;a=perspective-view of one ofthesemi circular spacers forproviding proper: spacing", between, the adjacent. inner: edges; of thepair of,- bushings: when: installed: in the bearing;

A mairr member, l0; designated: as a post; and" which is indicated. as;a. whole; by the reference ch'aracter'ZS: (Fig. 1),, has an-upper: main:cylin-T- drical section 26, an intermediate cylindrical sectionxfl anda-lower cylindrical section 28. The lower; section 28 for the most partvhas; a.- cylin drica-l surface of the same-diameter as the-uppersection- 2%.: The diametersof. the upperand? lower cylindrical 1sections. 21''. and 28.. are made. I slightlyless, than the. internaldiameter: of. the;

bushin s, t0; be removed or installed so that the bushingswill beslidable on eitherfsection. The diameter of the intermediate section; 2is larger andisslightly less; than the externaldiameter.of:-thebushings-:orthe internal diameter: of the." bearing for thebushings,sothat: the;-

bearing itself without the bushings will-be-:slid-- able overtheintermediate/section 2.1.; Tl'ieiposta 25. iseadapted: to be removablyset. up in. a. bases- 29, and for this purposethe: base 29; is--,formed;-

With a toprecessdil: which is of proper" diameter to accommodate the.stem .3 lof reduced diameter" at the, bottom of the. post 25:

A cylindrical channel 32 extendsupwardlyand axially; throughtheastemportion 3] andthrough theilower. main section 28iof the post: 25.-Ihisav interior channel; 32 sliding y accommodates; a,-

in the post when the post is removed from its base 29. will be explainedlater. The recess in thebase 29 has a central well 39 to accommodatefreely the bottom end or knob 38 of the plunger An annular groove 46extends around the lower main cylindrical section 28 of the post 25' atits approximate center. In this groove 40' are located two semi-circularidentical spacers 4|' and 42, one of these being shown-more clearly inFig; 6. A pin 43 extends radially inwardly from each of these spacersand radial channels are provided in' the post 25 and extend from thegroove 40' to the" central channel 32 and thus permit'the pins 43 toslide radially in or out in the post 25 when the'spacers are being movedinto their inner or outer position in their groove 4|'|. The outerperipheries of the spacers 4| and 42 are grooved in order to hold' acurved wire spring 44'(shown more clearly in Fig. 4). the

purpose of which wire spring is to'exert constant externalinwardpressure on the spacers 4| and 42 so as to tend to move them always totheir innermost position in the groove '40 of the post In the drawingsthe reference character 45 designates a connecting rod having acylindrical bearing adapted to have a customary pair of spaced bushingsmounted therein. In Fig. 1 the reference characters 46 and '4'!designate the old bushings which are to be removed from the bearing 45and which are to be replaced by the new bushings; and the referencecharacters and 5| indicate the new bushings which are to be placed inthe bearing 45. It will be noted that the old bushings 46' and "41 havetheir inner edges properly spaced slightly apart, thus leaving aninterior annular channel 48 into which The reason for such adjustment""the sections. of the post.

pins 43 having bearing contact with the plunger neck 35. When thespacers 4| and 42 and their spring 44 are so arranged, the spacers andspring lie entirely within the outer cylindrical surface of the section28 of the post 25, and thus a bushing, such as the bushing 50, caneasily be slid on or oiT the lower section 28 of the post. However, ifthere is no outer bushing to prevent outward movement of the spacers and42 then the thrusting of the plunger 33 upward, for example to theposition shown in Fig. 1, will force the spacers 4| and 42 outwardlycausing them to extend out beyond the cylindrical surface of The innerends of the pins 43 are rpunded slightly to facilitate their slidingengagement with the surface of the plunger, and the top diameter of theconical portion 34 of the plunger 33, at its junction with 30 irod 45,by a pair of new bushings,- the post 25 is lifted from -..the base 29and the plunger 33 is f 'wapost.

so as toimove-the-spacers 4| and 42 to their outoutward position belowthe bottom edge of, the The second bushing 5| is now slid on to-thelower end-of'the post and the post with le -the two bushings 50 and 5|in the positionslubricant is introduced through the oil hole 49 thecylindrical neck 35, is preferably reduced to a diameter slightly lessithan that of the neck portion so as ,to'form a slight recess.- Thisslight recess facilitates the); sliding ofthe ends of the pins 43 fromthe neck 35 and on to the conical surface 34 when the plunger is thrustupwardly usefrom the position illustrated in Fig: 3 to that shown inFig. l for the purpose of moving-the spacers outwardly. w

When it is desired to replace a pair of old bushings in abearing;suchas-thabearing in the pulled downwardly causing the spacers4| and 42 to assume their innermost position. With the 1 plungerremaining inthis position one of the 351new bushings desiredfor thebearing, thus the Z bushing so, is placed on the lower end of the i post25 and slid upwardly past the spacers and 42 until this bushing'engagesthe shoulder at the lower edge of-the intermediate section 21 of theThen the plunger 33 is thrust upwardly bushing 50.

shown in Fig. 1 is set up in the base 29. If a used for applying thenecessary pressure required for pressing out the old bushings andpressing in the new bushings, the base 290i the device is placed on thebase of the vise. With the cap 54 and guiding ring 53 removed, theoperator slides the connecting rod bearing with its pair of old bushings4B and 41 down over'the 55 upper section of the 'post25 as illustratedin The external diameter of the ring member 53 is the same as theadiameter of the intermediate cylindrical section 21 of the post 25. 7

A cap member 54. as shown more completely in Fig. 2, completes mydevice. This cap member has an inside cylindrical surface, the diameterof which corresponds to the diameter of the bearing surface of theconnecting rod 45 and thus the cap member 54 is of proper dimension toslide over the ring 53 and also over the intermediate section 21 of thepost 25.

From Fig. 3 and Fig. 1 it will be apparent that, when the plunger 33 ispulled downwardly in the post 25 until the plunger neck 35 is in registration with the pins 43, the semi-circular spaders 4| and 42, pressedinwardly by their spring 44, will move to their innermost position asillustrated in Fig. 3 with the inner ends of the- Fig. 1. The ring 53 isnext set in place on the post around the boss 52.

will be resting on the bearing in which the re- 00 placement ofthebushings is to take place.

05 sure, the operator willhold the rod 45 substantially in horizontalposition-with one hand while- 7 ward force on the cap 54,"as apparentfrom Figs;- 5 and 2, will be to push the bearing first down Pressure isnow applied to the top of the cap" 54 in order to force the cap andbearing downwardly over the post 25. Assuming that the vise 55 (Fig. 5)is to be used for applying this presoperating the vise with the otherhand so as to causethe vise jaw 51 to move forcibly down wardly on thecap 54. Theeffect of this downover the intermediate section 21' of'thepost 25 Finally the cap 54 is set down over the ring 53iand thus the cap54 Y section 28 of the post, to force the new bushings 59 and 5| intothe hearing. The spacers 4| and 42 will of course keep the new bushingsspaced the proper distance apart as the bearing is pushed down overthem, and the oil hole 45 of the hearing will finally be positioned overone of th spacers when the downward pressure is to be discontinued.

When the bearing has been moved down over the new bushings the vise 55is opened, the cap 54 is lifted off of the post, and the bearing withthe post held therein, is lifted from the base 29. The operator thenpulls the plunger 33 downwardly to the position shown in Fig. 3. Thiscauses the spacers 4| and 42 to be retracted to their innermost positionand permits the hearing with the two new bushings properly positionedtherein to be slid off the lower section of the post. Finally the oldbushings 46 and 41 are slid off the top of the post and discarded.

The function of the ring 53, as evident, is to enable the cap 54 to bepositioned quickly and accurately in preparation for the downwardpressure on the cap. Thus with the ring 53 in place the bottom edge ofthe cap will not engage the old bushings but will properly move downover the old bushings 46 and 41 and over the intermediate section 21 ofthe post as the cap thrusts the bearing down on to the new bushings.

Various other means could of course be used for exertin the necessarydownward pressure on the cap 54 and on the bearing. Any simplequick-acting means will sufiice, since th entire operation with mydevice need require only a minimum of time and efiort.

If a single bushing is desired in the bearing in place of the pair ofsmaller bushings, my same device can be used provided the plunger 33 andspacers 4| and 42 are first removed from the post. This removal of thespacers is done by slipping the wire spring 44 off of the spacers andpermitting the two spacers to slide out entirely from their groove andthus permitting the plunger to be entirely withdrawn from the post. Theoperation of the device then follows in a manner similar to thatpreviously described with the exception of course that a single bushingis placed over the lower section 28 of the post instead of the pair ofbushings previously mentioned.

In the drawings I have shown th spacers 4| and 42 as beingsemi-circular, thus only two of them being required. A greater numbercould of course be used. With some sizes of bearings I prefer to havefour spacers, each approximately a quarter of a circle in length andeach having a pin sliding in a channel and engaging the plunger in thesame manner. Other modifications could also be made without departingfrom the principle of my invention.

I claim: 7

1. In a device of the character described for removing and replacing apair of spaced bushings, a post member having upper and lower maincylindrical sections of the same diameter, a

shoulder of larger diameter separating said main sections, an annulargroove in one of said main sections, a plurality of spacers in saidgroove and radially slidable therein, said groove being of sufficientdepth radially to enable said spacers to be entirely contained withinsaid groove when said spacers are in their innermost position, springmeans normally holding said spacers in said innermost position, an axialchannel in said grooved main section, branch radial channels connectingsaid axial channel with said groove, engageable elements extendingthrough said branch radial channels to said spacers, a manually-operableplunger located in said axial channel and extending beyond the end ofsaid post member, and a cam surface on said plunger arranged forengagement with said engageable elements for moving said spacersoutwardly in said groove against the force of said spring means.

2. In a device of the character described for removing and replacing apair of spaced bushings, a post member having upper and lower maincylindrical sections of the same diameter, a shoulder of larger diameterseparating said main sections, the diameters of said main sections beingapproximately equal to the internal diameter of said bushings and thediameter of said shoulder being approximately equal to the externadiameter of said bushings, an annular groove in said lower main section,a plurality of spacers in said groove and radially slidable therein,said groove being of sufficient depth radially to enable said spacers tobe entirely contained within said groove when said spacers are in theirinnermost position, means normally holding said spacers in saidinnermost position, an axial channel in said lower main section, saidchannel connected with said groove, a manually-operable element locatedin said axial channel and extending beyond the end of said post member,means actuated by said manually-operable element for moving said spacersoutwardly in said groove against the force of said first mentionedmeans, and a removable base for said post member.

BERT C. HAMILTON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 976,325 Wheeler et a1 Nov. 22,1910 1,589,633 Dunton et a1. June 22, 1926 1,736,529 Goeller Nov. 19,1929 1,897,737 Snarr Feb. 14, 1933 1,981,925 Russell et a1 Nov. 27, 1934FOREIGN PATENTS Number Country Date 1,830 Great Britain May 21, 191918,977 Great Britain Aug. 18, 1909

